Actually , he could run those Zelda game fullspeed , his GPU bottle neck his CPU . AMD 6570 for 720p(59$ on newegg) , AMD 6670 for 1080p and the newest 28nm AMD 7770 for sth higher than 1080p
Mario Galaxy require LLE back-end , only i5 2500k @ 4.4Ghz could run it full speed